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Document Designation and Title Year Select Item(s) D6502 Standard Test Method for Continuous Measurement of On-line Composite Samples of Low Level Filterable Matter (Suspended Solids) and Non-Filterable Matter (Ionic Solids) in Process Water by X-Ray Fluorescence (XRF) 08 D6502 Standard Test Method for On-Line Measurement of Low Level Particulate and Dissolved Metals in Water by X-Ray Fluorescence (XRF) 99(2003) D6502 Standard Test Method for On-Line Measurement of Low Level Particulate and Dissolved Metals in Water by X-Ray Fluorescence (XRF) 99